GNU TeXmacs is a free wysiwyw (what you see is what you want) editing platform with special features for scientists. The software aims to provide a unified and user friendly framework for editing structured documents with different types of content: text, mathematics, graphics, interactive content. TeXmacs can also be used as an interface to many external systems for computer algebra, numerical analysis, and statistics. New presentation styles can be written by the user and new features can be added to the editor using Scheme.

FreeType 2 is a high-quality and portable font engine that is capable of supporting several font formats (be they bitmapped or scalable) through a simple and uniform interface. Its design is modular and allows independent "font driver" modules to be added, even at runtime, to support additional formats. It also provides a high-quality anti-aliasing renderer, an innovative auto-hinting engine, and support for the following font formats: TrueType Type1, CID-Type 1, Multiple Masters Type 1 OpenType/CFF, pure CFF, and CEF Windows FNT/FON.

The goal of the Pango project is to provide an Open Source framework for the layout and rendering of internationalized text. It uses Unicode for all of its encoding, and will eventually support output in all the world's major languages.

rxvt-unicode is a clone of the well known terminal
emulator rxvt, modified to store text in Unicode
and to use locale-correct input and output. It
also supports mixing multiple fonts at the same
time, including Xft fonts, real transparency, and
an optional embedded Perl interpreter that allows
you to extend your terminal easily.

The DejaVu fonts are a font family based on the Bitstream Vera Fonts. Its purpose is to provide a wider range of characters while maintaining the original look and feel. The family is available as TrueType fonts and also as third-party packages for various operating systems, including handhelds.

FontForge is an outline font editor that lets you create your own Postscript, TrueType, OpenType, CID-keyed, multi-master, CFF, SVG, and bitmap (BDF) fonts, or edit existing ones. It also lets you convert one format to another, and has support for many Macintosh font formats.

DoubleType is an attempt to make a type designer (font editor) that builds TrueType font files. It is designed with collaborative creation in mind. Unlike other programs that work on a single binary file,
DoubleType stores each glyph in a separate text
file.